Cutoff tool



Ap i 23,1946. b. SLAN'THONY ETAL 2,398,9

GUTOFF TOOL Filed May 29, 1944 7///////////// gall/2 INVENTORS. 2/6/007 OZD QLwQJM Patented Apr. 23, 1946 UNITED STATES PATENT OFFICE I 2,398,913 CUTOFF rooL I M David s. Anthony, and William B. mockerfsan Antonio, Tex., assignors to Anthony, Tool Com parry, San Antonio, Tex., a partnership Application May 29, 194 4, Serial No. 537,864

- V 4 Claims.

The present invention relates to a novel adaptor for cut-01f tools and holders of the type and kind disclosed in detail in the Anthony patents Nos. Reissue 21,877 and 2,254,056. These cut-ofi tools and holders are particularly adapted for use with power operated lathes, screw machines, boring mills and other machines of the conventional types for quickly and efliciently cutting stock of substantially any diameter or cross section. They are further adapted for use in making deep cuts with machines such as shapers and planers.

it is to befunderstood thatthe same is suscep Amongthe objects of thepresent invention is V to provide a novel tool holder and adaptor or attachment therefor in which various types and forms of cutting tools or blades may be quickly assembled and interchanged, and in which the cutting blade i maintained in rigid, adjusted position.

A further object of the invention is the provision of a novel mounting for the cutting blade or tool in which the means such as set screwsor the like for adjustably holding or securing the blade or tool inoperative position, do'not bear against or engage the surface of'the blade or tool,

tion and prevented from being accidentally or unintentionally displaced in use.

In th disclosure of the prior Anthony patents,

the, cutting blade or tool with or without an auxiliary supporting blade, is mounted in a recess formed or provided in aface of the tool holder. This reces had to be in substantial conformity with the shape or contour of the blade or tool in order to furnish a rigid backing or support therethe cut-off tools and holder ar necessarily made in d fferent sizes for cutting stock thatmay vary through a wide range of dimensions and relative hardness, it will be evident that were these tool holders each provided with a different haped reces to accommodate the various shapes of blades or'tools now on the market, the number oftool holders and the expense involved would be prohibitiveto many manufacturers.

In accordance with the present invention, to use blades of different contour for a particular size of holder, merely requires the substitution of an adaptor contoured to receive that particular blade. This greatly decreases the cost and the requirement in the number and styles of tool or blade holders.

Further objects are to provide a construction of maximum simplicity, efliciency, economy and ease of assembly and operation, and such further objectsadvantages and capabilities a will later tible of. modification and change, and comprehends other 7 details, arrangements Of" parts, features and constructions 1 without departing from the spirit of the invention;

In the drawing: 7 I v Figure 1 is a perspective and novel adaptor and showing the manner of mounting the cut-oi tool'or'blade within the adaptor and holder.

Figure Zis a View in vertical cross sectio taken in aplane. represented bythe line 2-2-"of Figurel' v I. 7.17.

Figure 3 i a vi'ew 'in perspective of the novel adaptor shown in Figures 1 and 2.

Figure 4-is a view in vertical cross section through a slightlymodified form of adaptorland cut-off tool or blade and showing its manner of mounting in the tool holder; Figurebis a view similar toFigure 4 but disclosinganother form ,of adaptor, and cut-elf tool or'blade; 1 I

Referring more particularly to the disclosure in the drawing and especially to the embodi mentshown in Figure ,1, 2 and 3, the tool holder l comprises .a shank 2.0g 'anysuitable contour for mounting the holder upon a conventional or standard type of turretlathe, although it will be understood that instead of the straight shank shown theshankmay be, angularly arranged or of any other suitable contour for mountingupon the carriage, tool post or flat top compound of" a lathe or other machine. I V L This shank is provided with a supporting plate 3 having adjacent oneend, an arcuate, undercut recess '4 for thereception and pivotalmounting of a complementary shaped trunnion '5 formed or provided on thefrear face of the tool support 6. Adjacent its otherend, the supporting plate 3 carries a locking bolt] adapted to be received in an arcuate slot 8 .in the tool support 6 whereby this tool support is permitted limited rotation about its trunnion or'fulcrum 5 should the cutface' fonthe receptioniofthe noveladaptor or attachment l I provided witha substantially verview of the tool holder tically extending wall 12 and an overhanging flange l3: The=exterior surfaces of" the. wall-I2 and flange l3 are such that the adaptor conforms to the contour of the upper and interior face of the recess but the lower surface 14 of the recessbeing undercut to form an inwardly inclined shoulder so as to effectively maintain the blade or tool rigidly and fixed within the'support-bytipping it inwardly against thewall l2vv of the adaptor. Preferably the lower edge of theblade or tool, or the supportin blade, where one is porting blade .of. a cheaper grade-of. steel. and

thereby providing. a definite saving as the narrow blade need merely be replacedwhen suficiently worn, In the disclosed embodiment the blade being-symmetrical, it. may. be. reversed so that either end is available for cutting, Whereth'e posed in a plane below that of the axis of the fulcrum-5 and the lower surface or edge of the blade or blade support, where a separate support is provided, should be disposed in a plane below "the seat or lower surface of the shank, whereby the cutting blade or tool may be most effectively employed. Furthermore, as set forth above, the 5 lower surface of the blade, with or without a blade proper and its support are made separate,

the lower edge of the blade andthe. upper edge 7 flush or straight and,is interlqckfidandrjgidly retained in the recess providedthereforbymeans of thesetscrews, l T which preferablybear against plungers l8 and the latter in turn bear again st the. upper surface ,of the flange [3 so as to force the blade and its support downwardly intorlgid contact with th inclined edgeror shoulder M. To make. t is-p0ssible, the wall or plateJZ'is of a depth somewhatless thanthal; of the combined blade andsupport.

In Figure. 4 is disclosed an alternate construction of adaptor lainwhichthe upper surface 28 or the. fl n e! I .i v inclined r. apered ou war and downwardly and the abutting surface of the tool support 6 is tapered or inclinedin a like or complementary manner, so, as to, tend. to force the adaptor inwardly andgdownwardly. Formost general, uses .this surface neednot bginclined or apered as e have ound. h ttbese s w I1 and plunger l3 abuttin the hat outer surface of th'e'adaptor will holdthisadaptor and itsblade securely in position. Where theflange 2| is in clined, it is preferablethat ,the abutting surface of .the plunger 18 bejnclin'ed in alikemannerso as to giveit optimumsuriace contact with the inclined or tapered surface 20.

Figure ,5 discloses a furtheralternate construc: o inwhic rthe ut n edge 110f the blade. 3 s. consider blvwiderthan. thebodv i theb ade, n this-form the, aptor Misrrwided W ha latively de p slot 2 l oaccomm datot e'width of the cutting-ed e,

Toobtain themost effective cutting, the width of the blade. andwsupportwhether formed separately or integrally, should prefierably. be apDroXimately. one-half, the, diameter-of the cross section of, the stockto be out. Furthermore, the upper surface or cutting edge of the blade is shown disseparate support, is substantially co-extensive in length with the cutting surface of the blade or tool but of a thickness somewhat less than that of the cutting edge so that the lower edge of the blade may enter the groove cut in the Work or stock without danger of binding.

, If desired, the upper surfaceof the flange of the adaptor may be recessed to receive the lower end-of the. plunger or set screw to lock the adaptor against shifting or displacement.

Having thus described our invention, we claim:

1. Means for mountin a cut-off tool in a .tool holder, comprising an adaptor to be received in a recess provided'in a face of the tool holder and provided with an overhanging flange at its upper end, and a vertically extending rear. wall providing lateralsupport for the tool throughout a substantial portion ofits length, the interior face of the rear wall being recessed adjacent its upper end to receive and retain a cut-01f tool having a cutting edge of greaterv thickness at its upper edge, and means engagingthe overhanging flange for forcing the tool downwardly and clamping it between the flange and base of the recess.

25 Meansfor mounting a cut-off tool in atool holder provided with a. recess having alongitudinally extending and inwardly inclined shoulder against which the lower edge ofthe tool is clamped, comprising an adaptor for the tool adapted to be received in the recess and provided with an outwardly extending flange at its upper end adapted to bear against the cuttingedge of the tool and force the lower edge of the tool against the inclined shoulder and lock the tool in operative position.

3.v Meansior mounting acut-ofitoolina tool holder, comprising an adaptor to be received in a recessprovided in a face of the'tool holder having anunder-cut shoulder forming the base of the recess, the adaptor being providediwith-an overhanging flange-at its upper end, a vertically extending rear wall providingl-ateral support for the tool throughout a substantial portion of its lengthand its lower-edgeinclined in conformity with the shoulder, and means for applying avertical gripping action uponthe overhanging flange atwidely spaced points for forcing the tool downwardly and gripping it between the flange and base of the recess v 4. Means for mounting-a cut-01f tool in atool holder, comprising an adaptorlto be received-in a recess provided in a face of the tool holder and having an inwardly inclined shoulder against which the lower edge of the tool seats, said adaptor being provided with an overhanging flangeand a vertically extending rear wall providinglateral support for the tool throughout a substantial portion of its length-and width but with its width being lessthan that. of the recess whereby pressure applied directly to the upper surface of the flange forces the tool into clamping engagement with the inclined. shoulder of the recess, and means associated with the adaptor and disposed at widely spaced pointsfor-locking theadaptorv and. tool ;in operative position.

' DAVID S. ANTHONY.

WILLIAM B. BLOCKER. 

